A ball with an initial velocity of 6.15 m/s rolls up a hill without slipping. (a) Treating the ball as a spherical shell, calculate the vertical height (in m) it reaches. m (b) Repeat the calculation (in m) for the same ball if it slides up the hill without rolling. m

Large electric fields in cell membranes cause ions to move through the cell wall. the field strength in a typical membrane is 1.0 x 10 7 n/c. what is the magnitude of the force on a calcium ion with charge +e? what is its acceleration? is it possible for a particle with the same charge as as calcium to have a different acceleration if placed at this location? what would change the acceleration: mass of the particle? diameter of the particle?

The built in flash in a compact camera is usally capable of giving correct exsposure for distance up to how many meters?

How does changing the frequency affect the energy of the wave?